Summary:
Heritage CUSD 8 has one high school, Heritage High School, serving grades 9–12 and enrolling 121 students. Its 2024–2025 student-teacher ratio was 10.7 to 1, and its reported low-income measure was 48% free/reduced lunch eligible. Chronic absenteeism was 25% in 2025–2026, compared with 24% statewide and 20% districtwide. The most notable overall result is the school’s 100% graduation rate, 10 percentage points above the state’s 90% rate.
Heritage High School’s clearest academic strength is ELA, while grade 9 math is the main current weakness. In 2025–2026, ELA proficiency was 77% in grade 9 and 71% in grade 10, respectively 16 and 17 percentage points above state results. Science was also above the state in both grades: 52% versus 47% in grade 9 and 63% versus 48% in grade 10. Math varied sharply by grade: grade 9 was 32%, 10 points below the state, while grade 10 was 50%, 14 points above. In the 2024–2025 grade 11 ACT results, ELA and science were also above state levels, while math was nearly even.
Results shifted in different directions from 2024–2025 to 2025–2026: grade 10 ELA rose 21 percentage points and grade 10 math rose 25, while grade 9 math fell 14 and grade 9 science fell 23. Across the six PreACT grade-and-subject results, the average state advantage increased from 7 to 9 percentage points, but that overall improvement masks these uneven changes. SchoolDigger gives Heritage High School four stars and ranks it 124th of 620 Illinois high schools, at the 80th percentile, for 2025–2026; it was at the 31st percentile in 2023–2024. That ranking rise is a relative ranking change, not a measure of test-score growth. There is no other high school in the list for a school-to-school comparison, and 2025–2026 grade 11 ACT school results were suppressed by the state.
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